Title :
Progress in the development of Nb/sub 3/Sn conductors based on the "Powder in tube" method with finer filaments
Author :
Londenhovius, J.H. ; Hornveld, E.M. ; den Ouden, A. ; Wessel, W.A.J. ; ten Kate, H.H.J.
Author_Institution :
ShapeMetal Innovation B.V., Enschede, Netherlands
fDate :
6/1/1999 12:00:00 AM
Abstract :
Inspired by the successful operation of the 11 T Nb/sub 3/Sn experimental dipole magnet MSUT, a new large bore 10 T@4.5 K Nb/sub 3/Sn model dipole magnet is under development in The Netherlands. For application in this system, Shape Metal Innovation (SMI) has developed a new "Powder in Tube" type of Nb/sub 3/Sn conductor with an increased number of filaments. At a strand diameter of 0.9 mm, the diameter of the filaments after reaction for only 33 hours at 675/spl deg/C has been reduced to about 20 microns. The non-copper critical current density has been measured to be as high as 1890 A/mm/sup 2/ at 10 T@4.25 K.
Keywords :
critical current density (superconductivity); multifilamentary superconductors; niobium alloys; tin alloys; type II superconductors; 0.9 mm; 10 T; 33 h; 4.2 K; 675 C; Nb/sub 3/Sn; Nb/sub 3/Sn conductors; critical current density; finer filaments; model dipole magnet; powder in tube method; Capacitive sensors; Conductors; Copper; Critical current; Heat treatment; Niobium; Powders; Production; Superconducting filaments and wires; Tin;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
